Growing an acorn in water is a fun and easy way to learn about the process of germination. With just a little help from you, the acorn will grow into a full-sized live oak tree.

In this article, you’ll learn how to grow an acorn in water and watch it sprout. You’ll also learn about the science behind how this works.

Why Grow an Acorn in Water?

When you grow an acorn in water, you can observe the whole germination process. You’ll learn about how moisture, temperature, and light affect growth.

What Do I Need?

In order to grow an acorn in water, you will need the following:

  • A clear glass jar with a lid.
  • An acorn
  • Potting soil or wet paper towels (optional)
  • Water

A Step-by-Step Guide: How to Grow an Acorn in Water?

A Step-by-Step Guide: How to Grow an Acorn in Water

Listed below is a step-by-step guide on how to grow an acorn in water:

1. Chose the Location:

Pick a spot with indirect sunlight. The collect acorns will need to sit in this location for several weeks, so make sure it’s not too bright and is easy to access.

2. Prepare the Jar:

Fill the jar about 3/4 full of water. If you like, you can keep it on a shelf or table, make sure the location isn’t too bright, or else the acorn will turn green.

3. Place the Acorn:

Place your acorn in the water. Try to orient it so that its widest side is facing up. Trying to grow an acorn with its pointed end. Pointing down may make it float/roll around the vessel, making it harder to see.

4. Monitor the Acorn:

Observe your acorn daily for growth. If you notice green mold growing on the top of the water, pour out some of the water and clean off the jar. If necessary, use a cotton swab or toothpick to remove any mold that may start to grow on the acorn.

5. Water is Necessary:

Be sure to keep the water level slightly above the acorn but not so high that it starts to spill into or overflow from the container. If you don’t have a clear jar, the water will need to be refilled much more often every other day or even daily.

6. Wait and Watch:

You’ll need to wait at least 3-4 weeks for your acorn to grow into a sapling. The length of the process depends on the type of acorn you start with and how much sunlight it gets. The warmer and sunnier your location is, the faster your acorn will grow.

7. Plant:

When the acorn has reached the desired size (usually about 1-2 inches), you can plant it in a pot with soil and water it regularly until the tree is established.

Science Behind Growing an Acorn in Water

Science Behind Growing an Acorn in Water
  • The acorn starts to sprout when you place it in the water, and the sprouting process is sped up by heat and light.
  • Moisture and temperature affect growth; too much or too little of either can cause mold or rot.
  • If your acorn doesn’t grow into a tree after four weeks, try starting it in a soil-based medium instead.
  • The water carries nutrients to the acorn, allowing it to grow.

Fun Facts About Acorn Trees

Acorn trees are a fun way to learn some interesting facts about trees.

  • Acorns are one of the only seeds known to produce multiple trees.
  • Once an acorn tree reaches full height, it can live for 100 years or more.
  • Mature acorns belong to the genus “Quercus,” which is Latin for “oak.”
  • The acorn shell is a type of fruit.
  • Acorns are used in cooking and can be made into a coffee substitute or even jelly.

How to Care for Your New Acorn Tree?

How to Care for Your New Acorn Tree

The following are a few tips on how to care for your new live oaks:


If you’re planting acorns in a container, be sure to use well-draining potting soil. You can add sand or perlite into the mix if you like. Pot up your tree when it has reached a height of 1-2 feet and is growing new leaves.


Acorns don’t need to be watered as often as other plants because they can store water, but it’s still important to keep the soil moist. If you notice the leaves drooping or drying out, you should increase the watering frequency.


Fertilize your tree every few weeks by adding slow-release fertilizer pellets into the ground. Spread a 3-inch ring of mulch around the base and water it every few weeks to keep the soil moist.


Pruning can be done once your tree reaches mature height (most likely between 10 and 25 feet). Trim branches off with bypass pruners to keep it in shape or thin out the crown if necessary.


Pests like borers can live under the bark of an acorn tree and cause damage to its trunk. Check for borer holes by peeling back the bark and removing any infected branches before spreading spores throughout the tree.


Pin oak wilt is a fungal disease that’s common among live oaks. It can kill your leaf if you don’t treat it early enough and spread to other trees as well. To prevent the disease from spreading, prune out infected branches and burn or discard them immediately.


You can harvest live oak acorns once they have fallen from the tree and turn brown. They should be easy to remove but try not to damage the nut.


Growing an acorn into a tree is a fun and rewarding experience, and it’s easy to do with just a few simple steps.

Not only will you have a new addition to your garden, but you’ll also be able to enjoy the beauty of live oaks trees in their early stages. Ensure to water and fertilize your tree regularly, and prune it as needed for optimal growth. As your tree matures, keep an eye out for pests and diseases that may affect its health. With proper care, your acorn will grow into a beautiful live oak tree that you can enjoy for years to come!